Coincidence occurrence indicator



1960 G. H. RdBIsoN ErAL 7 coNcDENcE occURRENcB INDIcAToR i1edI oct, 27, 1948 It is a featufe of tho pfosent invention that no anode of grid potentialS afe suppHed ffon1 independent souTceS to electTon dischafge devices o and 10 in any of the chan nels. NeceSSary filan1ent potentials for nlanlentS (not shown in the dfaWing) of devices and aTe defived ffoIn SI1itable soufces, alSo not Shown. It is pTefefable to Supply heatef potential to these HlaInents in each channel ffon1 an individuaL low capacity, high voltage inSulation, ffansfofIneT in ordef to decrease the poSSibility of filaInent to cathode breakdovvn, and also to elinlinate inteTchanne1 coupling.

The opefation of the fon1 channel SySteIn deScribed above iS SoIneWhat aS foHovVs. Inout pulSes deTived fron1 the eventS undef obSofvation and having a voltage afnplitude of betvveen 500 and 2000 volts, negative vifh TeSpect to gfound are applied to the TeSpective channels. TheSe inpofpolseS are applied to input devicos 6 alld contTol deviceS 10 in the -IT1in11er n1entionod above. Mofe paf ticularly, the fllll input voltage of each channel iS applied to the ca thode of the input diode o and thiS same inpUt p111Se voltage iS attenI1ated by the coInpensated netWoTk including TesiStofS 7 and 8 and capacitoTS 0 and a Hed to cathode 14 of control deviceS 10. The input voltage appHed to fhe said control devices is attenuated thfough said notvvoTk in o1-def that tlle contTol grid voltage (Te ceived ffom input device 0 as vill be seen later) vin alvays be sI1fficient to cut the said oontfol devices off on a fapidly Tising poftion of the pulSes suppHed to the grid 31 of the Said control devices. Such attenuation Inust be cafefuny adiusted1n oTdef to affofd as nluch ultinlato plato voltage foT the said oonffol deviceS 10 as is possible under fhe circun1Stances While ovoiding fhe loSS of contfol by the Said g1idl The outpot of each of the input deviceS 6 is conlbined in, and passed by conductoT 27 to the delay line 28 Which in the preSent eInbodin1ent has a delay value of 0.2 nicroSecond and then appHed through condnctof 30 to the gTid 31 of fhe control devices 10. Thus the frst pulSe appeaTingat any of the inpUt tefIninals of the Te spective channelS 1 through 4, iS paSSed thfough delay line 28 to the gridS 31 and thefeby xes the resolving tiIne of the entiTe Systenl inaSn1uch aS the signal derived ffon1 Such a pulSe in input devices o and paSSed fhTough the Said delay line is Sl1111cient to c11t off confrol devices 10 vvhen applied to the Said grid 31. ThuS, also, the appHoation of a pulse to one of the input feTIninalS after the appearance of the fifst pulSe at gfidS 31 vviH not 1)aSS to the output ciTcuit of Said channel and the non-occufrence of the event TepreSented by SI1ch a pu1se within the pfedeteTn1ined fesolving tiIne of the System is thus evidenced by the inactive state of the output circuit indi catof. IIovvever, dufing the intefval in Which grid 31 haS I1ot Teceiveda deactivating Signal throngh delay line 28 each of said channels is in condition to pasS the oTig ina1 pulSe applied to cathode 14 of said channel fhrough condUctor 32 to capacitoTS 18 and chaTge the SaIne. The fesulting signa1 appearing at grid 16 cauSes output deviceS 11 to oease conducting thuS Stopping cuffent f1ovv through the winding of re1ay 12 and perInit n1ovable afn1 23 to be puHed into contact vvith contact point 25. (Zufrent fiow throngh neon indicating deviceS 13 iS thus pefmitted, thefeby senSibly indicating the pasSage of a puISe thTongh a pafticular channe1 vvithin the predeter- Inined tiIne period. In like Inanne1the occurrence of the event under obsefvation vvithin a fixed `tiIne peTiod vvith feSpect fo the other events under obServation is indicated.

1t Should be noted in this connection that resiSto1 29 in the gfid fet11rn circuit of contfo1 devices 10 Should be choSen so that the tinle constant of this cifcI1it is SUCh as to olifT1inate the poSSibility of the pasSage by control deviceS 10 of a pulSe occurfing at the tin1e aftef the predeteTmined feSolving fime of the syStem. Prefefably, Tesistof 29 should be chosen So that the inactive tiIne -of conffol devices 10 is af least a thousand tinToS the delay tin1e of delay line 28.

Aftef the eXafnination of a paTfioulaf group of eventS and the indication of the occurTence of non-occuTTence of the Sanle within the pfedetefn1ined tifne peTiod by neon indicatofS 13 the SySteII1 can be feSet to its initial condition by momenfarily depreSSing TeSet SWitch 21 thus cal1Sing anode potential to be applied to output deviceS 11 and Tesetting Telay 12 so that movable aTn1 23 iS in contact vvith contact point 24 and thus also fetorning neon indicafofS 13 to fheif llnlit condition.

It vvilI thuS be seen that vvhat haS been described iS a p1UTa1 Channel SySteIn fof deterInining the occuffence of nonoccuffence of ovenfs undef obSefvation Within a predetefInined tin1e, Which tin1e is independent of the vaTi ability of chafacteristicS of the systefn con1ponents, obvious1y n1any variationS Will pfeSent then1Selves t() one Skined in the aft, for eXaInple, in place of the ontput deviceS 11 and felay 12 a SenSitfol type felay IIlay be pfovided in the plate ciTcuit of contfol deviceS 10 in Such a Inanner fhat the said Telay vvould operate aS a ballistic galvanoIneter. FUTtherInofe, alfhough pafticulaT types ofolectfon discharge deviceS have been shown and described, other devices IT1ay be eInp10yed, for eXaInple, in place of dua1 triode devices 6 and 10 0ther deviceS having Suitable chafacteriSfics nlay be s11bStitI1ted. Sin1i laTly in place of output devices 11 a thyTatron t1be Inay be affanged so that the output of control doviceS 10 Would fife the thyfatfon and light a neon indicator in paralle1 With the anode load TesistoT of Said thyfatfon. In a like n1anner, a positive input pulse could be pasSed by the sySten1 by the pfovision of SUitable polarity invefting deviceS intefposed betvveen the contfol devices 10 and output device 12. It is thefefofe appafent that no liInitations Should be placed on the Scope of the present invention except as lT1ay appear in the appended clain1s.

What is claimed iS= 1. 1n electfonic SySten1 fof indicating tho oocuTTence of a plurality of e1ectfically detectable'eventS vithin pTe deteTmined time intefvalS comprising Sepafate input Ineans electrically aSSociated vvith the events undef obSefvation, an electronic channel aSSociated vvith each input IneanS including contTol Ineans and indicating Ineans, and tiIning nleans aSSociated with each of said input nleanS and said control IIleans and adapted to derive a sigT1a1 from Said input Ineans and apply the Sanle aftef a predeteTInined tiIT1e to said control IneanS to effect deactivation of each of said channels.

2. An electfonic sySteIn for indicating the occuffence of a plurality of electfically detectable eventS vvithin pfe deteTmined time inteTvalS comprising Separate input nloans electTically aSSociated vvith the evenfS undef ob sefvation, an electTonic channe1 aSSociated vvith each input nleanS including control Ineans and indicating Ineans, tiIning n1eanS associated With each of Said input IneanS and Said contfo1 IneanS and adapted to derive a signal fron1 Said inpnt Ineans and apply the same aftef a pfedeterInined tiIne to Said control IneanS to eifect deactivation of each of Said channels, and IIleans fof fesetting said sySten1 to its initial condition after the obSefvation of each gfoup of events.

3. /n electronic system fof indicating t11e ocoufTence of a pluTality of eloctfically detectable eventS Within pTedeteonlined tin1e in teTva1s con1pfising Separate input n1eanS electrically associated vvith the eventS under obServation, an electronic channel aSSociated with each input n1eanS including control n1eans and indicating n1eanS, and tin1 ing IneanS aSSociated With each of Said input n1eans and Said confrol Ineans and adapted to derive a Signal froIn said input IneanS and apply the Same aftef a pTedotefIT1ined tinle to said control IneanS to effect deactivation of each of Said channelS for an extended tiIne period.

4. An electronic circLlit for indicating the occuffenco of a p1ufality of electTically dotectable eventS Within prede toTn1ined tiIne infefvalS ooInpriSing a plurality of electfonic channelS at leaSt coffeSponding in nunlber to the nun1bef of eventS under obServation, each of Said channe1S (including an input cifcuit, an output ci1cuit incloding sensible indicating TneanS and control neanS connecfed theTebetvveen Tesponsive to a predetern]ined sig11al o pTe vent activation of Said outpUt oiTcI1it, and ciTcLlit IIleans including delay n1eanS associating all of Said input ciTouits and all Said contTol neanS and adapted to deTive a signal ffoIn at least the 1st input pulse and pass the sanle to said control means to deactivate the san1e.

S. An electronic circuit for indicating the occuTTence of a pluTalfty of electrically detectable eventS vvithin pre deterInined tin1e interva1S conlpTisi11g a p1UTality of electTonic chan11elS at leaSt correSponding i11 nlln1ber to the nUInber of eventS under obServatio11, each of said channels including aI1input oi1cI1ft, an oUtput oircuit including Sensible indicating IneaI1s and control nleanS conneoted there`- betvveen Tesponsive to a pTedetern1ined signa1 to 1)revent activation of said output circuit, circnit nfeans including delay o1eanS associating an of Said inpot ciroUitS and a11 Said control Ineans and ada )ted fo derive a signal fron1 at least the Tst inp11t 111Se and pass the san1e o said con tfo1 n1eans to deactivate the same, and means fol Tesetting said syStem to itS initia.1 conditio11 afte1 fhe obServatio11 of each groI1I of events.

6. In a systeIT1 of the charactef deScribed, the coII1bina tion of a 1)1I11ality of electronic channels each coInpTising in1)Ut ternlinalS, a fi1St Signal tesponsive device, a oontrol e1ec tfon diSchaTge device having at 1east aI1odo, oathode and control electrodes and an oIItpot sigIlal TeSponSive device havi11g at least an input teTII1inal and an outpt circuit including Sensible indioating n1eanS, comn1on signal de lay means having an input and an oufput ferD1ina1, n1eans connecting each of said fifst signal fesponsive devices in seIies betWeen Said first n1eIItio11ed input teTninalS and the inpnt terIIi11als of said delay means, means conneCting the cont1o1 device in each Tespective channel iI1 sefies betvveen the Tespective channe1 fiTSt IT1eII1tiolled inpl1t terminalS and the Tespective channel input terminal of said oufput device, and n1eanS oonnecfing the outpUt ternlinal of said delay nleanS With he control electTode of each of Said co11tro1 deviceS.

7. The sySteIn of claiIn 6 in which Said fi1St Signal TesponSive Unidirectiona1 cIIrrent conductive device is a diode ty1)e vacuun1 Ube.

8- In a system of the characteT deScribed, the coInbination of a pluIality of electfonic channelS each coInpriSing input ter1inalS, a fiTSt SigTlal reSponsive device, a contTol electron dischaTge device having at 1eaSt anode, cathode and contTo1 electTodeS and an o11tpot Signal TeSponSive de vice having at least an in )l1t tern1iIlal and an o11tput ci1- cuif including SenSible indicating Tneans, coInn1on signal delay n1eanS having an inp1t and an output teTIninal, I1eano connecting the signa1 TesponSive devico of each Tespective channel iI1 Series betWeen fhe reSpective chan11e1 fiTst entioned input tern1inalS and he input teTnlinals of Said deIay n1eans, IIlea11s i11clllding signal attenl1ating n1eans connecting fhe contfo1 device in each channel in sofies etWeen the TeSpective channe1 fiTst nlentioned in put teTIninals and the Tespective channel input tern1inal of Said outpnt device, aI1d n1eans connecting the oIltput ern1ina1 of said delay n1eans With the contTol eloctTode of each of said control devices.

lefofonoeS cffed iI1 the file of this patent UNITED STATEs PATENTS 1, 153,737 Hoom et a1 Sept. 14, 1915 1,887,684 II11izinga Nov. 1S, 1932 Z Z8S,5s6 Batte11 Iune 9, 1942 2 3Z9 o48 Hunegafd Sept. 7, 1943 

